Look! The pandas _____ leaves over there

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问题选择题

Look! The pandas _____ leaves over there.[ ]

A. eat

B. eating

C. are eating

D. eats

答案

答案：C

选择题

SARS stalked about the land, touching one _____ with his evil fingers, and thousands of people

have fallen victim to him in 2003. [ ]

A. now and then

B. here and there

C. up and down

D. in and out

单项选择题

DGA法脱硫，一般情况下溶液浓度控制在（）（质量分数）。

A、15%～25%

B、25%～30%

C、30%～50%

D、50%～70%